Harness cam lever and roll



HARNESS GAM LEVER AND ROLL File'd Jan. 2, 1924 1 6 11mly Patented Sept. 15, 1925.

UNITED STATES PATENT; oF-FICE..

BENJAMIN F. iMGGUINESSLOF GRAFTON, ,MASSACHUSETT ASSIGNOR TO CROMPTON KNOWLES LOOM-W-ORKS, OF WORCESTER, MASSACHUSETTS, A'COEPORATION OF MASSACHUSETTS. l

.HARNESS `CAM :LEVER AND ROLL.

Application filed January 2, l1924. Seria1vNo.'683,969.`

To all -wzo'ln t may concern:

vBek it known that I, BENJAMIN F. Mo- GUiNnss, a citizencf the United States, residing at Grafton, in the county of Worcester and State of Massachusetts, have invented a new and useful Harness Cani Lever and Roll, of which `the following is a speci- Iication.

This invention relates'to harness mechanism for looms and more particularly. to the construction of the levers and cam rolls such as are employed on socallcd cam har-` ness motions. y

In harness motions of the type yto which this invention relates i'tis customary to have a group of relatively thin cams :fastened to a driven shaft and a. corresponding group 0f harness levers, one for each cam,v

the levers being connected to the harness frames. When a motion of this type is applied to looms for weaving very heavy fabrics it is found that the rolls which cooperate with the cams are subjected to such heavy strain as to break the studs upon Which they are mounted. Accordingly, it is the principal object of my invention to provide an impro-ved mounting for the rolls so that the same may be used for weaving heavy fabrics without undue breakage.

A further object of my invention is to provide a harness lever with a roll bearing part of which is formed directly on the lever and the remainder of which isy provided by means of a stud. n Y

With these and other objects in view which will appear as the description proceeds, my invention resides in the combination and arrangement of parts hereinafter described and set forth in the claims.

In the drawings, wherein I have shown a convenient form of the invention,

Fig. 1 is a top plan view of a cam harness motion to which my invention may be applied,

Fig. 2 is an end elevation of the structure shown in Fig. 1, and f Fig. 3v is an enlarged section through the harness lever, roll, stud and portionfof the associated cam.

Referring to the drawings it will be seen that the loom side 10 has secured thereto and extending therefrom a frame 11 having cross girts 12 on which are mounted bean ings 13. Shaft 14C is received by the bearoppositev ends l-of the levers are provided with connectors rv21 which are operatively connected to the harness frames (not shown).

As shown in Fig. 2 thefcams` are provided with tracks 22 whichV cooperate with the rolls 30 carried by the levers. 'lhefroll operating faces ofthe cams are arranged so as to move the levers and their harness frames in proper sequence to operate the harness to produce any predetermined weave, as is customary in this type of motion. f

My invention .has more particular refs erence to kthe construction of the lever and roll and by referring to Fig. 3 it will be seen that the lever 20, which may be taken as representative of `all the levers shown in Fig. 1, is provided with a boss 31 extending laterally therefrom and through which passes the shank of a stud 32. The stud is provided with an enlarged bea-ring portion 33 which is -of slightly greater diameter than the diameter of the boss 3l. The roll 30 is provided with a bearing surface 34k to cooperate with the bearing surface 33 of the stud and also is provided with a second bearing surface 35 of somewhat less diameter than the surface 34 to cooperate with the boss 31. The cam track 22 is preferably deiined by means of flanges 36 which have tapering walls 37 and the outer bearing surface of the roll 30 is crowned as indicated at 38 so that the driving contact between the flanges 36 and the roll 30 is located substantially in line with the'enlarged portion 33 of the stud 32.

It is found when such a construction as disclosed herein is employed that it is possible to vuse a stud the shank of which is of considerably greater length and diameter than the thickness of the lever to which it is fastened. Also, because of the difference in the diameters of bearings 34 and' 35 the portion 33 of the stud serves to retain the roll and prevent accidental loss thereof. It-will`be further noted that although the sha-nk of the stud is considerably longer than the thickness ofthe lever the roll is nevertheless provided with a bearing the length of which is substantially equal to the distance between the adjacent faces of thecam and lever. v Y

I-Iaving thus described my invention it Will be apparent that changes and modifications may be made therein by those skilled in the art Without departing from the spirit and scope of the invention and I do not Wish to be otherwise limited to the details herein disclosed, but What I claim is:

l. A loom harness lever having a boss eX- tending laterally therefrom and provided with an external bearing surface, a stud eX- tending throughy and beyond said boss and having a bearing surface of larger diameter than the diameter of the bearing surface of the boss, and a roll having internal bearing surfaces of diameters substantially equal to the diameters of the bearing surface of the boss and bearing portions of the stud; p

2. In a harness lever, a roll rotatably mounted with respect thereto, said roll having internal bearing portions of different diytion formed on the outer end of the stud of larger diameter than the diameter of the boss and in contact with the internal bearing of the roll of larger diameter.

3. In a cam harness motion, a cam having flanges formed with tapered inner surfaces, a roll having a crowned cam engaging face in engagement with said flanges, a cam lever, a boss on said lever having an external bearing surface, a stud passing through said boss and lever and secured to said lever and having a bearing surface of larger diameter than the diameter of the bossand internal bearing surfaces formed on the roll to engage said boss and said bearing surface of the stud, said roll having bearing Contact with the tapered portion of the flanges which are most remote from the lever and in substantial alignment With the bearing 

